| 摘要 |
PURPOSE:To suppress rotational fluctuation of a disc rotary body due to centrifugal force effectively by elastically energizing a rotational fluctuation suppressing member, having a tapered face on upper side and engaged with a disc rotary body on the tapered face, and a bearing to axial direction with a spring member. CONSTITUTION:Rotational fluctuation suppressing members 3 are ring-like bodies and are fixed to bearings 2 on their inner periphery sides. Again, their upper face sides are made in tapered faces T, and their angles are set up in corresponding to shape of an engaged disc rotary body 5, that is, the centrifugal force due to rotation of the disc rotary body 5 formed so as to be able to bestow inertia moment to a rotary shaft 1 according to rotational ability of the rotary shaft 1 or bearings 2. While, on out side of the inner race 2a of the bearing 2 on front side of the rotary shaft 1, is fixed a spring member S which acts to suppress expanding energy with elastic force together with the rotational fluctuation suppressing member 3, for expan sion to outer direction from the axial center due to centrifugal force of the disc rotary body 5. According to such constitution, rotational fluctuation of the disc rotary body 5 due to centrifugal force can be suppressed effectively. |
